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Uselessmark 02-10-2013 03:58 PM

rear diff swap question
pretty sure my rear diff is junk in my 03 wrx. but ive found plenty of junkyard replacements. my question is can i use a diff outta an auto wrx. theres one closer therefore cheaper for me to get but will all gear match up

pzr2874 02-10-2013 04:52 PM

If the part#'s are the same,probably.

detrails01 02-17-2013 03:35 PM

wrx auto final drive ratio is 4.11 and manual is 3.90. Being that the auto trans has slightly different gearing since its a 4spd and the final drive ratios are different I would think theyd have the same differential ratios. Does that make sense?

Let me know if you find out as im curious too.

brfatal 02-17-2013 06:25 PM

The ratios need to be the same.

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